Errors seen in debug mode

When I run my site with debugging enabled, I see the following errors displayed:

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 339

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 342

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 354

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined variable: noofItems in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 191

Notice: Undefined variable: returnHTMLinsideProc in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 191

Notice: Undefined variable: returnHTMLinsideProc in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 195

Notice: Undefined variable: noofItems in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 195

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined variable: noofItems in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 191

Notice: Undefined variable: returnHTMLinsideProc in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 191

Notice: Undefined variable: returnHTMLinsideProc in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 195

Notice: Undefined variable: noofItems in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 195

Notice: Undefined variable: subloopHTMLObj in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 138

Notice: Undefined variable: nameofsubloopTmp in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 212

Notice: Undefined variable: nameofsubloopTmp in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 212

Notice: Undefined variable: nameofsubloopTmp in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 214

Notice: Undefined variable: nameofsubloopTmp in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 214

Notice: Undefined variable: keypass in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 97

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 339

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 342

Notice: Undefined offset: 1 in /home/divehightide/public_html/wp-content/plugins/json-content-importer/class-json-parser.php on line 354

Do you know what might be causing this. I get these errors with every JSON feed / template. These errors are actually from you example kux.de feed within the documentation.

Many thanks

https://www.ads-software.com/plugins/json-content-importer/